Some companies offer unlimited PTO. The catch is the culture often discourages people from taking more than a few weeks off. It's been shown if the company just offers N weeks people take more time off than if it were unlimited, which seems ironic.
...that unlimited PTO can't be accrued, and is usually still subject to approval to use like regular limited PTO, which makes it an easy mechanism for arbitrary favoritism by managers without the fallback that if your PTO isn't approved you at least keep and accrue your balance which can be used later in your career or cashed out, and which the company then has an incentive to allow.you to use to clear the liability from their balance sheet.
A coworker that typically holds the heavens up like Atlas felt like he's burning out, so he's about to take 3-6 months off to do yoga in Switzerland or something. Everyone's happy for him. It sucks for project schedules I'm sure, but it's better to take a break and come back fresh than burn out and leave. Another coworker just came back from a 3 month sabbatical, and her fresh mental state will be a great productivity boost.
I just spent a week on a family vacation, then another week volunteering at a solar car race, and then another few days visiting family. I was looking forward to actually getting some focused work done this week, but now I'm out sick and only have the mental capacity to read HN and sleep. I suppose I feel about as productive as I usually do, since I can still respond to people on slack all day!
a) sour grapes
b) people being unwilling to admit that they prefer paternalism instead of being capable of making their own decisions about how to balance work and life
(FWIW for me, making my own decision looks like "4-5 wks per year, not including a handful of ad-hoc 3-day weekends throughout the yr")
Are there other benefits or forms of comp where it's preferable not to agree on amounts beforehand?
To an extent I've been very blessed in my career, and I've always been able to accept new jobs based on my fit with the project and the team. I've also had success negotiating compensation to serve my interests. I've never seriously factored in vacation days into any sort of comparisons. I've never found myself in an environment where my manager had any expectation of proscribing when I should take time off. On the contrary, every manager I've ever had has been wholely supportive whenever I've taken time off. I think a large part of that comes down to my attitude and work ethic. I've certainly become spoiled, though. Unless my situation changes drastically, I wouldn't consider working somewhere with less flexibility than I currently enjoy. I would work for less compensation if it was the right project, though.
Ive seen this a million and one times since I started working in tech, including my nontech friends being blown away by the perks of Google and concluding that they must work me like a dog (I worked a hard 35 hrs/wk at the time).